Water circulating pump



l Aug. 14, 1934. G. A. VISSER 1,969,996

WATER C IRCULATI NG PUMP Filed Aug. 5, 1953 INVENTOR ATTORNEYv Patented ug. 14, 1934 UNITED STATES PATENT OFFICE My invention relates to a pump for maintaining water circulation between the cylinder jackets-not shown-of an internal combustion l engine and the radiator of an automobile power plant.

The primary object of the present invention is to eliminate the strain of the main driving member on the impeller shaft of thepump, a floating mechanism hereinafter more fully described being located between the main driving member and the floating impeller shaft of'the water pump.

With the foregoing and other objects in view which will appear as the description proceeds, the invention further resides in the combination and arrangement of parts and inthe details of construction hereinafter described and claimed, it being understood that changes may be made in the precise embodiment of the invention herein disclosed without departing from the spirit of the same.

In the drawing accompanying this specification:

Figure 1 is an elevation of the pump;

Figure 2 `is a ,f horizontal sectional View through the pump casing and the main driving member, showing the floating impeller shaft and means coordinating with a main driving member for actuating the impeller shaft.

Figure 3 is a cross-sectional view takenon or about line 3-3 of Figure 2, through the impeller shaft, the hub of the main driving member, the roller bearing housed in the hub, and the cup-shaped member encircling the impeller shaft and coordinating with the main driving member, to actuate the impeller shaft.

Referring now to the reference. numerals indicated on the drawing:

An impeller or rotor 10, housed in a pump casing is'fltted to a floating impeller shaft 11 .formed with ashoulder 12 which is held against a` seat 13-to'provide a water seal--by a spring 14 lodged within a cup-shaped floating member 15 of polygonal form in cross-section.L The spring 14 is also adapted to hold a main driving member 16 against a ring 17, located at the end of the hub 18 of the pump casing 19, upon a sleeve 20, rigidly supported in said.

hub 18 and projecting beyond the end of the latter. The floating cup-shaped member 15 in which the spring 14 is lodged, is loosely sleeved over the impeller shaft 11-its outer open end being relatively larger in diameter, forming a 'shoulder 15', overlapping an annular ring 21- located at' the outer end of the sleeve 20, projecting fromv the hub 18 of the pump casing. The outer enlarged end 15B of the cup-shaped member .l5-in which the spring 14 is lodgedis of polygonal form in cross-section 'and is adapted to coordinate with the polygonalreturn bend 22 of a hub 23, projecting outwardly from the wall 24 of the main driving member 16, which in the present embodimentV comprises a divided, grooved pulley, constructed of sheet metal, spot-welded together to form a unitary device. Located between an annular tread 26- lining the inner surface of the hub 23 of the main driving member and the sleeve 20-rigidly supported in the hub 18 of the pump casing 19,

fis a roller bearing 25-the rollers being journaled at one end in the wall 24x71 of the main driving member or pulley 16, and at the other end in the annular ring 21, located at the outer end of the sleeve 20-projecting from the hub 18 of the pump casing.

Screwed upon theouter end of the floating impeller shaft 11 is a polygon-shaped nut 28, complementary in formation, and coordinating with the polygonal wall 15"L at the outer end of the oating cup-shaped'member 15 in which therein, thereby rigidly securing the sleeve to.

the hub;the oil flowing from the cup passes into an oil chamber 34 and thence through ports 30, 35, 31,`leading respectively to the roller bearings 25-and to a chamber 32, formed by the flaring seat 13 of the annular element 27, against which the shoulder 12 of the impeller shaft 11 closes under the urge of the spring 14--as previously explained.

Pinned to the end of the impeller shaft 11,

within the pump casing 19, is a rotor or impeller 10,of the usual well known centrifugal pump type.

. Apacking ring 33 upon the'impeller shaft 11 is fitted in th'e sleeve 20, against a shoulder 20e,A

4and forms in conjunction with the inner end of the yelement 27, an oil chamber 34, from which the oil passes through the port 30 to the roller bearings, and through a groove 35, in the ele- Vment 27 and port 3l, to other parts to bel lubricated.

Having indicated the several parts by'reference numerals, the construction and operation of the device will be readily understood.

In assembling the pump 10, the driving memberA 16 is mounted on sleeve 20, against ring 17 and the impeller shaft 11 within the pump casing, is thrust through a bore in the element 27, the

packing ring 33, and the cup-.shaped floating member 15.

The nut 28 is then screwed upon the end of the floating impeller shaft 11, until it is on a plane with the edge of. the polygonal-shaped end of the floating cup-shaped member 15, in

. which the spring 14 is lodged. The main driving member 16, with the polygonal-shaped return bend 22, engaging the outer enlarged polygonal end 15n of the cup-shaped member 15 is then drawn outwardly on the floating impeller shaft 11 until the polygonal-shaped portion 15l of the cup-shaped member. 15 overlaps the polygonal walls of the nut 28, with which it interlocks. The driving member 16, is then manually rotated in its usual driving directionthereby causing the nut 28 to be screwed upon the end of the impeller shaft, thus drawing the shoulder 12 of the floating impeller shaft against the seat 13,'and the main driving member 16, against the ring 17, at the end of the hub 18 of thepump,-as may be readily understood from an examination of the drawing.

It will be seen that any untoward strain, or wear on the main driving member 16,-rotatable upon the roller bearings carried in the sleeve 20, rigidly supported in the hub of the pump casing-will not be borne by the floating irnpeller shaft driven by the main driving member,-- because of the reflex action of the intermediate cup-shaped floating member 15, as will be readily understood. Y

Having thus described my invention, what I claim is:

1. In a pump, a pump casing; a rigid annular surface in said casing; a bearing for an impeller shaft housed in the annular surface; of a floating shaft fitted with an impeller and a shoulder adapted to seat on the end of the bearing for the impeller shaft to effect a water seal; a floating member encircling the impeller shaft; a spring sleeved over the impeller` shaft; a nut screwed on the end of the shaft; and a main driving member both slidable and rotatable upon the rigid annular surface of the pump casing, the floating member, nut, and main driving member respectively interlocking, whereby the nut may be adjusted A through the manual rotation of the driving member, thereby yieldingly seating the shoulder of the' impeller shaft on the end of the bearing to effect a water seal, and securing themain driving la'teral movement.

2. In a pump. a Dump casingan annular surface rigid in said casing and projecting `beyond a hub integral with the casing; a bearing for an impeller shaft projecting beyond onevend of the annular surface to form a seat; a floating shaft fitted with an impeller and a shoulder adapted to be seated on the end of the bearing for the impeller shaft, to effect a water seal; a floating member encircling the impeller shaft; a spring housed in the floating member and sleeved around the impeller shaft; `a nutscrewed on the end of the shaft; and a main 4driving member both slidable and` rotatable. uponthe rigid annular surface of the'pump casing projecting beyond the hub of the latter, the floating member, nut, and main driving member being respectively interlocking, whereby the nut -may be adjusted through a manual rotation of therdriving member', thereby seating the shoulder of the impeller shaft on the end of the bearmember against ing to eect a water seal,-and securing the main driving member against lateral movement.

3. In a pump, a pump casing including a rigid annular surface; a bearing for an impeller shaft located within the rigid annular surface; a floating shaft fitted with an impeller and provided with a shoulder adapted to seat on the end of the impeller shaft bearingy to provide a water seal; a floating member encircling the impeller shaft; a spring housed in the floating member and sleeved upon the impeller shaft; Va nut screwed upon the end of the shaft, adapted to interlock with the floating member; a main driving member v-both slidable and rotatable upon the rigid annular surface of the pump casing, also adapted to interlock with the floating member, whereby upon manually rotating the main driving member when it is interlocked with the floating member and the latter with the nut, the shoulder on the impeller shaft will be thereby forced to its seat on the end of the impeller shaft bearing, and the main driving member simultaneously secured against longitudinal movement on the rigid annular surface of the pump casing.

4. In a pump, a pump casing; an annular surface rigid in said casing and extending beyond a hub integral with the casing; a bearing for an impeller shaft in said annular surface; a floating shaft fitted with anv impeller and a shoulder adapted to be seated on the end of the bearing for the'impeller shaft to effect a water seal; a ring bearing tted in the rigid annular surface of the casing and sleeved on the floating shaft, in spaced relation to the end of the first named bearing, to form an oil chamber, said ilrst named bearing having a groove for the passage of oil from the oil chamber through the bearing; an oil cup communicating with the oil chamber; a floating member encirclingthe impeller shaft; 'a spring housed in the floating member upon the impeller shaft; a nut screwed on the end of the shaft; a main driving member slidable and rotatable upon the rigid annular surface of the casing,-said driving member, intermediate floating member, and nut respectively interlocking, whereby the nut may be manually adjusted through the driving member tosecure the driving member against lateral movement.

5. Inl a pump, a pump casing including an annular sui-face rigid in the casing and extending beyond a hub integral with the casing; a bearing for an impeller shaftl at one end of the annular surface; a floating shaft fitted with an impeller and a shoulder adapted to seat on the end of the bearing to effect a water seal; a polygonal cup-shaped floating member, encircling the impeller shaft; a spring housed in the floating member; a driving memberboth slidable and rotatable on the rigid annular surface of the pump casing, having a hub formed with a polygonal surface adaptedY to interlock with the polygonal surface of the floating member; a roller bearing fitted in said hub; and

a polygon-sided nut screwed .on the end of the shaft, adapted to interlock with the polygonal surface of the floating member, whereby upon 'adjusting the driving member the nut may be correspondingly regulated to secure the driving member against lateral displacement.

GERRIT A. VISSER. 

